I guess my hold up is if the pulley is a press fit over the bearings is it possible to to just pull the pulley and bearings off the top side of the shaft, press the bearings out of the pulley and replace them, and then press the pulley back down over the shaft? I looked on John Deeres website and I can find the parts list for the 39 deck, but mine is a 38. Are they identical other than 1 inch?